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PRELTMINARYHY_pROGEOLOGIC SSF.3SMENT_R�PO <br /> 1599 East Yosemite Avenue,Maneeea,California <br /> Delta Project No.40-88-480 <br /> Page 2 <br /> total petroleum hydrocarbons (TPH) using U.S. Environmental Protection Agency (EPA) <br /> - Method 8260 by a California-certified laboratory. <br /> s Developed the monitoring wells and collected water samples for each well. Water samples <br /> were analyzed for BTEX, EDB, EDC, and TPH by a California-certified laboratory using <br /> EPA Method 524.2. "t ' '" 7' es r <br /> Conducted and analyzed slug test for the determination of hydraulic conductivity. <br /> Analyzed and evaluated all data collected during the course of the site assessment. <br /> la PrevlQu5 WVr <br /> ETS Environmental(ETS)had been retained previously by Jerry Moore,of Moore Petroleum,Inc., <br /> _.. to conduct a preliminary site assessment at this location. This site assessment consisted of the <br /> drilling of four soil borings,installation of one monitoring well,and the collection of soil and water <br /> samples from the soil borings and monitoring well. The results of the work performed by ETS are <br /> ry. presented in the following sections. <br /> 1 1 11 B rin <br /> Four soil borings MW-1, SB-1,SB-2, and SB-3 were drilled by means of a hollow-stem auger to a <br /> maximum depth of 36 feet. Soil samples were taken at 5-foot-depth intervals by means of a <br /> California-modified split-spoon sampler. Figure 2 shows the Iocation of the soil borings and. <br /> monitoring well. <br /> Soil samples.collected from the soil borings were analyzed by a California-certified laboratory for <br /> BTEX,.EDC, EDB, TPH by EPA Method 524.2/8240: Results of the analyses are presented in <br /> Table 1. <br /> As shown in Table 1,BTEX constituents are found at low levels in all soil samples with the highest <br /> values found in the 20-foot-depth sample taken from MW-1. BTEX results from this sample were <br /> 0.05,0.03,0.42, and 1.6 ppm,respectively. <br />